fix: prefer gpt image model for scale adjust

app/api/canvas/local-edit/route.ts

@@ -394,8 +394,27 @@ function resolveScaleAdjustPreferredModelId(params: {
     params.models,
     params.configuredModelId
   );
-  if (isScaleAdjustUsableImageEditModel(requestedModel)) {
+  const gptImage2Candidates = params.models
-    return requestedModel?.model.id || params.requestedModelId;
+    .filter((entry) => isScaleAdjustUsableImageEditModel(entry))
+    .filter((entry) => getScaleAdjustModelFamily(entry) === "gpt-image-2")
+    .sort((left, right) =>
+      compareScaleAdjustProviderCandidates(
+        left,
+        right,
+        params.requestedModelId || params.configuredModelId
+      )
+    );
+  if (gptImage2Candidates[0]) {
+    return gptImage2Candidates[0].model.id;
+  }
+
+  if (
+    isScaleAdjustUsableImageEditModel(requestedModel) &&
+    requestedModel &&
+    getScaleAdjustModelFamily(requestedModel) !== "nano-banana-2" &&
+    requestedModel.provider.type !== "alibaba-image"
+  ) {
+    return requestedModel.model.id || params.requestedModelId;
   }
 
   const autoDetailModel = params.models.find(isScaleAdjustDedicatedDetailModel);